An ac source is rated 220 v, 50 hz. the average voltage is calculated in a time interval of o.01 s. it (a) must be zero (c) is never zero (b) may be zero (d) is (220w2)v.

2.22/3.33 points | previous answers tamucolphysmechl1 4.pre.002. ask your teacher my notes question part points submissions used on a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 2.40 m/s. (a) what are the magnitude and direction of the velocity of the red glider after the collision? magnitude 3.33 m/s correct: your answer is correct. direction correct: your answer is correct. (b) is this collision elastic?

=force × distance a. work b. velocity c. pressure d. momentum

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?